【摘要】：氣體絕緣開關(guān)設(shè)備(GIS)內(nèi)隔離開關(guān)操作過程中產(chǎn)生的特快速暫態(tài)過電壓(VFTO)威脅GIS和電力系統(tǒng)的安全運(yùn)行,需要采取有效措施進(jìn)行抑制。為驗(yàn)證鐵氧體磁環(huán)對于實(shí)際GIS內(nèi)VFTO的抑制效果,利用真型252 kV GIS試驗(yàn)平臺,在電源電壓分別為50 kV、100 kV以及140 kV時進(jìn)行了無磁環(huán)、20 cm鐵氧體磁環(huán)串、40 cm鐵氧體磁環(huán)串的系列對比試驗(yàn)。對試驗(yàn)結(jié)果的統(tǒng)計和分析表明,鐵氧體磁環(huán)對VFTO中的不同頻率成分均具有抑制作用,對于VFTO波形的主要參數(shù)包括過沖系數(shù)、最大峰值電壓、最大峰值陡度、第一峰值電壓、第一峰值陡度都有顯著的抑制效果。在試驗(yàn)條件下,擊穿電壓的大小對于抑制效果沒有顯著的影響。試驗(yàn)結(jié)果證實(shí)了在實(shí)際GIS設(shè)備中安裝鐵氧體磁環(huán)抑制VFTO的幅值和陡度的可行性。
[Abstract]:The very fast transient overvoltage (VFTO) produced during the operation of the isolating switch in the gas insulated switchgear (GIS) threatens the safe operation of GIS and power system, so it is necessary to take effective measures to restrain it. In order to verify the effect of ferrite magnetic ring on the suppression of VFTO in actual GIS, the true 252kV GIS test platform was used. When the supply voltage is 50 kV / 100 kV and 140 kV, respectively, a series of comparative tests are carried out on the 20 cm ferrite ring string and the 40 cm ferrite ring string without magnetic ring. Statistics and analysis of the test results show that ferrite magnetic rings can inhibit the different frequency components in VFTO. The main parameters of VFTO waveform include overshoot coefficient, maximum peak voltage, maximum peak gradient, first peak voltage, The first peak steepness has significant inhibitory effect. Under the experimental conditions, the breakdown voltage has no significant effect on the inhibition effect. The experimental results confirm the feasibility of installing ferrite rings to suppress the amplitude and steepness of VFTO in actual GIS equipment.
【作者單位】： 清華大學(xué)電機(jī)工程與應(yīng)用電子技術(shù)系電力系統(tǒng)及發(fā)電設(shè)備控制和仿真國家重點(diǎn)實(shí)驗(yàn)室;國家電網(wǎng)公司;華北電力大學(xué)新能源電力系統(tǒng)國家重點(diǎn)實(shí)驗(yàn)室高電壓與電磁兼容北京市重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金(51277106) 國家重點(diǎn)基礎(chǔ)研究發(fā)展計劃(973計劃)(2011CB209405)~~
【分類號】：TM277;TM595
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本文編號：2166343